AnyTIMESTAMPorDATETIMEcolumn in a table can have automatic initialization and updating properties; seeSection 13.2.5, “Automatic Initialization and Updating for TIMESTAMP and DATETIME”. DATE A date. The supported range is'1000-01-01'to'9999-12-31'. MySQL displaysDATEvalues in'YYYY-MM-DD'form...
TIME[(fsp)] A time. The range is'-838:59:59.000000'to'838:59:59.000000'. MySQL displaysTIMEvalues in'hh:mm:ss[.fraction]'format, but permits assignment of values toTIMEcolumns using either strings or numbers. YEAR[(4)] A year in 4-digit format. MySQL displaysYEARvalues inYYYYformat,...
In MySQL 8.0.22 and later, you can convertTIMESTAMPvalues to UTCDATETIMEvalues when retrieving them usingCAST()with theAT TIME ZONEoperator, as shown here: 在MySQL 8.0.22 及更高版本中,使用带有AT TIME ZONE操作符的CAST()检索时,可以将TIMESTAMP值转换为 UTCDATETIME值,如下所示: 代码语言:sql AI...
test_time CREATE TABLE `test_time` ( `if_id` int(10) unsigned NOT NULL, `coll_type_id` tinyint(3) unsigned NOT NULL, `value_diff` bigint(20) unsigned DEFAULT NULL, `rate` int(10) unsigned DEFAULT NULL, `coll_ts` time NOT NULL ...
mysql> # date能存1000-01-01 9999-12-31 mysql> # 时间类型 20:20:20 mysql> # 论坛每天来签到,记录签到时间 mysql> alter table test3 add sign time not null default 00:00:00; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL ...
2、Automatic Initialization and Updating for TIMESTAMP and DATETIME 3、总结 1、类型简介 1.1、存储使用的长度 MySQL 5.6.4版本之后允许TIME、TIMESTAMP、DATETIME类型具有[0-6]位小数部分(Fractional Seconds in Time Values), 因而存储使用长度为变化的 ...
1、DATE, DATETIME, TIMESTAMP三者的区别: 首先说一下三者的不同之处: The DATE type is used for values with a date part but no time part. MySQL retrieves and displays DATE values in '*YYYY-MM-DD*' format. The su...
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MySQL data types: CHAR, VARCHAR, INT, TEXT #Part-1 MySQL date and time DataTypes Overview: DATE, TIME, DATETIME, TIMESTAMP, YEAR & Zero Values #Part2.1 Automatically insert Current Date and Time in MySQL table #Part – 2.2 MySQL: Working with date time arithmetic #Part 2.3.1 ...
See also Section 11.2.10, “2-Digit Years in Dates”. Conversion of values from one temporal type to another occurs according to the rules in Section 11.2.9, “Conversion Between Date and Time Types”. MySQL automatically converts a date or time value to a number if the value is used...